I usually average between 16.5 to 18 mpg. The past few months its gone down to 14-15 mpg I think due to the frozen front caliper. I'll see what it is after I do a road trip with the newly replaced calipers. I have a V8 4WD with stock weight and 2" front / 3.5" rear lift. I do manual calculations on my MPGs and I average maybe 70 mph on the freeway with about 70% of my driving being on the freeway. I'll update my numbers in a few weeks.